Nitric acid has the formula HNO_3. If there are 3.61 x 10^23 atoms of N in the sample, how many moles of nitric acid are there?

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)